arduino-nano: Add GPIO input/output/read/write support (ef3ef992) · Commits · derf / multipass

include/arduino-nano/driver/gpio.h

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		#ifndef GPIO_H
		#define GPIO_H

		#include <avr/io.h>

		class GPIO {
		private:
		GPIO(const GPIO &copy);

		public:
		GPIO () {}

		enum Pin : unsigned char {
		pb0 = 8,
		pb1 = 9,
		pb2 = 10,
		pb3 = 11,
		pb4 = 12,
		pb5 = 13,
		pb6 = 14,
		pb7 = 15,
		pc0 = 16,
		pc1 = 17,
		pc2 = 18,
		pc3 = 19,
		pc4 = 20,
		pc5 = 21,
		pc6 = 22,
		pd0 = 24,
		pd1 = 25,
		pd2 = 26,
		pd3 = 27,
		pd4 = 28,
		pd5 = 29,
		pd6 = 30,
		pd7 = 31
		};

		void setup();
		void led_on(unsigned char id);
		void led_off(unsigned char id);
		void led_toggle(unsigned char id);
		inline void input(unsigned char const pin) {
		if (pin < 8) {
		} else if (pin < 16) {
		DDRB &= ~_BV(pin - 8);
		} else if (pin < 24) {
		DDRC &= ~_BV(pin - 16);
		} else if (pin < 32) {
		DDRD &= ~_BV(pin - 24);
		}
		}
		inline void output(unsigned char const pin) {
		if (pin < 8) {
		} else if (pin < 16) {
		DDRB \|= _BV(pin - 8);
		} else if (pin < 24) {
		DDRC \|= _BV(pin - 16);
		} else if (pin < 32) {
		DDRD \|= _BV(pin - 24);
		}
		}
		inline unsigned char read(unsigned char const pin) {
		if (pin < 8) {
		}
		if (pin < 16) {
		return (PINB & _BV(pin - 8));
		}
		if (pin < 24) {
		return (PINC & _BV(pin - 16));
		}
		if (pin < 32) {
		return (PIND & _BV(pin - 24));
		}
		return 0;
		}
		inline void write(unsigned char const pin, unsigned char value) {
		if (pin < 8) {
		} else if (pin < 16) {
		if (value) {
		PORTB \|= _BV(pin - 8);
		} else {
		PORTB &= ~_BV(pin - 8);
		}
		} else if (pin < 24) {
		if (value) {
		PORTB \|= _BV(pin - 16);
		} else {
		PORTB &= ~_BV(pin - 16);
		}
		} else if (pin < 32) {
		if (value) {
		PORTB \|= _BV(pin - 24);
		} else {
		PORTB &= ~_BV(pin - 24);
		}
		}
		}
		};

		extern GPIO gpio;

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		@@ -26,6 +26,7 @@ OBJECTS = ${TARGETS:.cc=.o}

		build/system.elf: ${OBJECTS}
		${CXX} ${COMMON_FLAGS} ${CXXFLAGS} -Wl,--gc-sections -o $@ ${OBJECTS}
		avr-size --format=avr --mcu=${MCU} $@

		build/system.hex: build/system.elf
		${OBJCOPY} -O ihex ${@:.hex=.elf} $@